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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Taxonomic position and geographical distribution of the common sheep G1 and camel G6 strains of Echinococcus granulosus in three African countries
Parasitology Research, Volume 100, No. 3, Year 2007
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Description
The taxonomic and phylogenetic status of Echinococcus granulosus strains are still controversial and under discussion. In the present study, we investigated the genetic polymorphism of E. granulosus isolates originating from three countries of Africa, including a region of Algeria, where the common G1 sheep and the camel G6 strains coexist sympatrically. Seventy-one hydatid cysts were collected from sheep, cattle, camels, and humans. Two mitochondrial markers (cox1 and nad1) were used for strain identification. Two nuclear markers (actII and hbx2) were used to study the possible occurrence of cross-fertilization. Despite the heterogeneity observed among the G1 isolates, they were all localized within one robust cluster. A second strong cluster was also observed containing all of the G6 isolates. Both strains appeared as two distinct groups, and no cases of interbreeding were found. Thus, the attribution of a species rank can be suggested. We also found the Tasmanian sheep G2 strain for the first time in Africa. Because of the slight variations observed between the common sheep and the Tasmanian sheep strains, further studies should be carried out to elucidate the epidemiological relevance of this genetic discrimination. © 2006 Springer-Verlag.
Authors & Co-Authors
Maillard, S.
France, Besancon
Laboratoire Chrono-environnement
France, Besancon
Université de Franche-comté
Benchikh-Elfegoun, Mohammed Chérif
Algeria, Constantine
Université Constantine 1
Knapp, Jenny
France, Besancon
Laboratoire Chrono-environnement
Bart, Jean Mathieu
France, Besancon
Laboratoire Chrono-environnement
Koskei, P.
Ethiopia, Addis Ababa
Addis Ababa University
Gottstein, Bruno B.
Switzerland, Bern
University of Bern
Piarroux, Renaud
France, Besancon
Laboratoire Chrono-environnement
Statistics
Citations: 86
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.1007/s00436-006-0286-9
ISSN:
09320113
Research Areas
Cancer
Genetics And Genomics
Study Locations
Algeria